Moolenaar is a name that originates in Holland.
It is a profession: A person that operates a mill.
Translations:

Miller

English

Molinaro / Mugnaio

Italian

Møller

Norwegian

Mlynář

Czech

Molinero

Spanish

Molenaar

modern Dutch

Mjölnare

Swedish

Mlynár

Slovak

Müller

German

Molnár

Hungarian

Meunier

French

Errotari

Basque

Mölder

Estonian

Mylläri

Finnish

O'Muilleor

Irish (Gaelic)

Moleiro

Portuguese

Møller

Danish

Młynarz

Polish

Morar

Romanian

Malūnininkas

Lithuanian

Mlinar

Croatian, Slovenian and Serbian

Değirmenci

Turkish

Μυλωνάς

Greek

Moliner

Catalan

Muelisto

Esperanto

Мельников

Russian

Mel'nikov

Russian

Мелничаров

Bulgarian

Malējs, Dzirnavnieks

Latvian

Muiñeiro

Galician

Млинар

Ukrainian

טוחן

Hebrew

طحان

Arabic

Chủ cối xay

Vietnamese

آسیابان

Persian

米勒

Chinese

मुलेनार

Hindi, Marathi

Molinarius

Latin (probably the origin for this name)

In Holland there used to be many windmills.
They were used to pump the water from the polders, grind flour, saw wood, etc.
Only few of them remain now, but the name Moolenaar can be found all around
the world.

An overview of people who are called Moolenaar and are present on the
Internet:

Vim desktop Calendar

A desktop calendar for 2019, made from one sheet of paper.
After folding, one side contains a useful 12-month calendar.
On the other side there is brief information about ICCF-Holland,
Vim and Zimbu. All files are PDF format, about 125 Kbyte.

NLUUG award

I am very proud to get this award for my work on Vim and open source in general.
The NLUUG is the Dutch Unix user group, they recently celebrated their 25th
birthday. Other people who previously received the award are Guido van Rossum
and Piet Beertema. So I'm in good company :-).